“Is Mike Pence the big threat to Palin in the primaries?”
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Definitely not!
DC doofuses will not stand a chance.
If he shows his hand early and runs for President as a Congressman, he will never hold any higher office than a Congressman because he will be seen as a guy always looking for the next stepping stone, and too ambitious to take a serious route to the top.
I like Pence too much to see his star fade that quickly, and it will if he decides to become the latest Congressman buried in the GOP Presidential graveyard because first holding a statewide office was just so beneath him.